DEPARTMENT OF MECHANICAL ENGINEERING
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Item Earing characteristics of cold-rolled and temper annealed aluminium 1200(Asian Network for Scientific Information, 2006) Aderibigbe, D. A.; Oluwole, O. O.; Olorunniwo, O. E.; Atanda, P. O.; Ogundare, O.Earing characteristics of deep-drawn cold-rooled and temper-annealed 1200 was studied at high deformation levels of 75,85,and 90% cold rolling. The relationshp of earing with varying degrees of cold roll was studied and the effect of different annealing temperatures on earing. Hardness, ductility and strength variations with earing were also studied. Earing was at an aneeal-temperature. The relationship of earing to hardness, ductibility and strength properties were observed to follow the same pattern. Hardness, ductility and strength properties of cold-rolled and temper-annealed Aluminium 1200 at lowest eaaring did not necessarily correspond to the materials lowest hardness, highest ductility or lowest strength respectively and were found to vary for varying degrees of cold-roll.Item Effects of temper annealing temperatures and times on the mechanical properties of cold-worked aluminium 1200(1989-04) Aderibigbe, D. A.; Sowole, O.O.Experiments have been conducted to develop temper- annealing schedule for continusly cast and cold-worked aluminium 1200. By using the method of graphical combination of the results of tensile and deep- drawn test, it is shown that a cost-effective temper-annealing schedule that would impart improved mechanical properties( compared with full annealing at 460° C for 6 hours) can be developed for Al-1200. For optimum combination of desired properties during deep- drawing, the 75% cold-worked material should be temper-annealed at 380 °C for 3 hours; the 85% cold-worked material should be temper-annealed at 400 C for 2 hours while the 90% cold-worked Al-1200 should be temper-annealed at 460 °C for 3 hours